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Sunday, 24 April 2011

1. Levels of organisationWhat are the four levels of organisation between organelle and organism?

Answer: cell; tissue; organ; system.

2. Anatomical planesName the three planes through which the body can be viewed and if you were looking down on top view of, eg a slice of the brain, which plane would this be?

Answer: saggital, coronal and transverse; transverse.

3. Anatomical directions

Describe: the position of the legs relative to the head (while standing); the elbow relative to the hand; the scaplulae (shoulder blades) relative to the sternum (breatbone) and the nose relative to the ears.

Answer: inferior; proximal; posterior; medial.

4. The cell

Which structure surrounds and contains the cell?

Which structure contains the chromosomes?

Which structure is the 'power house' of the cell?

What substance are all the structure of the cell contained in?

Answer: plasma membrane; nucleus; mitochondrion; cytoplasm (click on the diagram to see all the labels).

5. Types of tissues

Name the four main tissue types.

Answer: nervous; muscle, connective, epithelial.

6. Epithelial tissue by layers

Name the three classifications of epithelial tissue by layers. Of which type is the skin an example?

Answer: simple; stratified; pseudostratified. Stratified.

7. Epithelial tissue by cell shape

What are the three classifications of epithelial tissue by cell shape. Of which type is the skin an example?

Answer: Diffusion only works down a concentration gradient; facilitated diffusion takes place across membranes at specific carrier sites but only down a concentration gradient; active transport takes place across membranes at specific carrier sites but works against a concentration gradient and requires energy in the form of ATP (click on the diagram to see an animation).